CN118158392A

CN118158392A - Delay time measurement method, system and target on-screen frequency determination method

Info

Publication number: CN118158392A
Application number: CN202410526578.4A
Authority: CN
Inventors: 赵蕾; 金王赞; 肖龙云
Original assignee: Yongjiang Laboratory
Current assignee: Yongjiang Laboratory
Priority date: 2024-04-29
Filing date: 2024-04-29
Publication date: 2024-06-07
Anticipated expiration: 2044-04-29
Also published as: CN118158392B

Abstract

The invention discloses a delay time measurement method and system and a target on-screen frequency determination method, and belongs to the technical field of augmented reality. The delay time measuring method comprises the steps of determining the frequency of a target generator corresponding to a light source signal generating device based on the target on-screen frequency of the to-be-measured augmented reality equipment; under the condition that the light source signal generating device generates scintillation stripes based on the frequency of the target generator, obtaining first delay distribution based on first time corresponding to the received scintillation stripes transmitted by the light source signal generating device and second time corresponding to the received acquired images transmitted by the to-be-detected augmented reality equipment; and under the condition that the frequency of the target generator meets the setting requirement based on the first delay distribution, obtaining third time and fourth time based on the required test mode and the frequency of the target generator, and calculating to obtain second delay distribution of the to-be-measured augmented reality equipment. The delay time measuring method has universality and high accuracy.

Description

Delay time measurement method, system and target on-screen frequency determination method

Technical Field

The invention belongs to the technical field of augmented reality, and particularly relates to a delay time measurement method, a delay time measurement system and a target on-screen frequency determination method.

Background

An Extended Reality (XR) device can construct a virtual environment, and allow a user to interact with a real scene, where a delay time from a change of an object in the real scene to a display screen displaying a corresponding change picture is an important factor affecting a user's immersion. In the related art, since the augmented reality device is a terminal integration device, the delay time is limited by hardware, algorithm, usage scene and other aspects, and the assembled augmented reality device belongs to a black box, and a trigger signal of the internal hardware cannot be led out to determine the exposure and display period in the test process, so that the accuracy of the test result is low and the test method has no universality.

Disclosure of Invention

The present invention is directed to solving at least one of the technical problems existing in the related art. Therefore, the invention provides a delay time measuring method, a delay time measuring system and a target on-screen frequency determining method, which can improve the accuracy of testing delay time and have universality.

In a first aspect, the present invention provides a delay time measurement method, applied to a delay time measurement system for measuring a delay time of an extended display device to be measured, the delay time measurement system including a light source signal generating device, the method comprising:

determining a target generator frequency corresponding to the light source signal generating device based on the target on-screen frequency of the to-be-detected augmented reality device;

Under the condition that the light source signal generating device generates a flicker stripe based on the frequency of the target generator, obtaining first time delay distribution based on the received first time corresponding to the flicker stripe transmitted by the light source signal generating device and the received second time corresponding to the acquired image transmitted by the to-be-detected augmented reality device;

Under the condition that the frequency of the target generator meets the set requirement based on the first delay distribution, controlling the light source signal generating device to generate scintillation stripes based on a required test mode and the frequency of the target generator, and controlling the to-be-tested augmented reality equipment to acquire images of the scintillation stripes;

And calculating to obtain second delay distribution of the to-be-detected augmented reality equipment based on the received third time corresponding to the scintillation stripes transmitted by the light source signal generating device and the received fourth time corresponding to the acquired images transmitted by the to-be-detected augmented reality equipment.

According to the delay time measurement method, the target generator frequency corresponding to the light source signal generating device is determined through the target on-screen frequency of the to-be-measured augmented reality equipment, so that the time of generating the flicker stripe by the light source signal generating device is synchronous with the on-screen time frequency of the augmented reality equipment, and the phase difference is constant, delay fluctuation of the flicker stripe and the on-screen time point caused by beat frequency abnormality is solved, and the stability of data and the test precision in the measurement process are improved; under the condition that the light source signal generating device generates scintillation stripes based on the frequency of the target generator, the to-be-tested augmented reality device acquires images of the scintillation stripes, after the first time is determined based on the received scintillation stripes transmitted by the light source signal generating device and the second time is determined based on the acquired images transmitted by the to-be-tested augmented reality device, the second time delay distribution is obtained by making difference between the first time and the second time, beat frequency errors caused by moving the light source lightening time point in the upper screen frequency period are effectively avoided, accuracy of testing delay time is improved, and based on the delay distribution determined by the method, the whole process from capturing a real scene to upper screen after intermediate link processing is considered, and the testing method has universality.

According to the delay time measuring method of the present invention, the controlling the light source signal generating device to generate the flicker stripe based on the required test mode and the target generator frequency includes:

controlling the light source signal generating device to generate the flickering stripes based on random lead delay and the target generator frequency under the condition that the required test mode is a random phase mode; the random lead delay is a random value in a target period, and the target period is determined based on the target on-screen frequency.

According to the delay time measurement method of the present invention, the controlling the light source signal generating device to generate the scintillation stripe based on the required test mode and the target generator frequency further includes:

and controlling the light source signal generating device to generate the flicker stripes based on the target generator frequency, the first lead delay, the target period and the target time interval under the condition that the required test mode is a specific phase mode.

Under the condition that the required test mode is a beat frequency mode, determining a target generator frequency corresponding to the light source signal generating device based on an initial step length and the target on-screen frequency;

The light source signal generating device is controlled to generate the scintillation stripe based on the target generator frequency.

According to the delay time measurement method of the present invention, after the first delay profile is obtained, the method further includes:

and based on the first time delay distribution, under the condition that the target generator frequency does not meet the set requirement, adjusting the target generator frequency, and returning to execute the first time delay distribution based on the received first time corresponding to the scintillation stripe transmitted by the light source signal generating device and the received second time corresponding to the acquired image transmitted by the to-be-detected augmented reality device under the condition that the light source signal generating device generates the scintillation stripe based on the target generator frequency.

In a second aspect, the present invention provides a delay time measurement apparatus for a delay time measurement system for measuring a delay time of an extended display device to be measured, the delay time measurement system including a light source signal generation device, the apparatus comprising:

The signal determining module is used for determining the frequency of the target generator corresponding to the light source signal generating device based on the target on-screen frequency of the to-be-detected augmented reality equipment;

The delay test module is used for obtaining first delay distribution based on the received first time corresponding to the flicker stripe transmitted by the light source signal generating device and the received second time corresponding to the acquired image transmitted by the to-be-detected augmented reality equipment under the condition that the light source signal generating device generates the flicker stripe based on the frequency of the target generator;

the signal control module is used for controlling the light source signal generating device to generate scintillation stripes based on a required test mode and the target generator frequency under the condition that the target generator frequency meets the set requirement based on the first delay distribution, and controlling the to-be-tested augmented reality equipment to acquire images of the scintillation stripes;

The delay distribution determining module is used for calculating and obtaining second delay distribution of the to-be-detected augmented reality equipment based on the received third time corresponding to the scintillation stripes transmitted by the light source signal generating device and the received fourth time corresponding to the acquired images transmitted by the to-be-detected augmented reality equipment.

According to the delay time measuring device, the target generator frequency corresponding to the light source signal generating device is determined through the target on-screen frequency of the to-be-measured augmented reality equipment, so that the time of generating the flicker stripe by the light source signal generating device is synchronous with the on-screen time frequency of the augmented reality equipment, and the phase difference is constant, delay fluctuation of the flicker stripe and the on-screen time point caused by beat frequency abnormality is solved, and the stability of data and the testing precision in the measuring process are improved; under the condition that the light source signal generating device generates scintillation stripes based on the frequency of the target generator, the to-be-tested augmented reality device acquires images of the scintillation stripes, after the first time is determined based on the received scintillation stripes transmitted by the light source signal generating device and the second time is determined based on the acquired images transmitted by the to-be-tested augmented reality device, the second time delay distribution is obtained by making difference between the first time and the second time, beat frequency errors caused by moving the light source lightening time point in the upper screen frequency period are effectively avoided, accuracy of testing delay time is improved, and based on the delay distribution determined by the method, the whole process from capturing a real scene to upper screen after intermediate link processing is considered, and the testing method has universality.

In a third aspect, the present invention provides a method for determining a target on-screen frequency for the delay time measurement method according to any one of the embodiments of the first aspect, where the method includes:

Acquiring initial screen frequency of the to-be-detected augmented reality equipment;

Adjusting the initial screen frequency based on a target step length to obtain a target test frequency of the light source signal generating device;

And calculating the target on-screen frequency of the to-be-tested augmented reality device based on the delay distribution obtained by controlling the light source signal generating device by the target test frequency and controlling the to-be-tested augmented reality device by the initial on-screen frequency.

According to the target on-screen frequency determining method, the target test frequency of the light source signal generating device is effectively obtained by adopting a frequency approximation method through the initial on-screen frequency and the target step length of the acquired to-be-detected augmented reality equipment; the method comprises the steps of testing a light source signal generating device controlled based on target test frequency and an initial on-screen frequency controlled augmented reality device to obtain two delay distributions, and effectively calculating to obtain target on-screen frequency based on data corresponding to the obtained delay distributions.

According to the target on-screen frequency determining method, the target step length comprises a first step length and a second step length, and the target test frequency comprises a first test frequency and a second test frequency; the step of adjusting the initial on-screen frequency based on the target step length to obtain a target test frequency of the light source signal generating device comprises the following steps:

Based on the first step length, adjusting the initial on-screen frequency to obtain the first test frequency of the light source signal generating device;

and adjusting the initial on-screen frequency based on the second step length to obtain the second test frequency of the light source signal generating device.

According to the target on-screen frequency determining method of the present invention, the calculating to obtain the target on-screen frequency of the to-be-measured augmented reality device based on the delay distribution obtained by controlling the light source signal generating device by the target test frequency and controlling the to-be-measured augmented reality device by the initial on-screen frequency includes:

Calculating to obtain a first slope based on a first initial distribution obtained by controlling the light source signal generating device by the first test frequency and controlling the to-be-tested augmented reality device by the initial on-screen frequency;

Calculating a second slope based on a second initial distribution obtained by controlling the light source signal generating device by the second test frequency and controlling the to-be-tested augmented reality device by the initial on-screen frequency;

And calculating the target on-screen frequency based on the first slope and the second slope.

According to the method for determining the target on-screen frequency of the present invention, the calculating the target on-screen frequency based on the first slope and the second slope includes:

Constructing a first relation based on the first slope, the first test frequency, the initial on-screen frequency and the target on-screen frequency;

Constructing a second relation based on the second slope, the second test frequency, the initial on-screen frequency and the target on-screen frequency, wherein the relation is used for representing an association relation between a delay change amount of an event period calculated based on the target on-screen frequency and the target test frequency and a delay change amount of the event period acquired based on a test process; the event period is a period of flashing stripe lighting;

and adding the first relation and the second relation, and calculating to obtain the target on-screen frequency.

In a fourth aspect, the present invention provides a target on-screen frequency determining apparatus, including:

The frequency acquisition module is used for acquiring the initial screen frequency of the to-be-detected augmented reality equipment;

the test frequency determining module is used for adjusting the initial screen frequency based on a target step length to obtain a target test frequency of the light source signal generating device;

The frequency calculation module is used for calculating the target on-screen frequency of the to-be-measured augmented reality device based on the delay distribution obtained by controlling the light source signal generation device by the target test frequency and controlling the to-be-measured augmented reality device by the initial on-screen frequency.

According to the target on-screen frequency determining device, the target test frequency of the light source signal generating device is effectively obtained by adopting a frequency approximation method through the initial on-screen frequency and the target step length of the acquired to-be-detected augmented reality equipment; the method comprises the steps of testing a light source signal generating device controlled based on target test frequency and an initial on-screen frequency controlled augmented reality device to obtain two delay distributions, and effectively calculating to obtain target on-screen frequency based on data corresponding to the obtained delay distributions.

In a fifth aspect, the present invention provides a delay time measurement system comprising:

A light source signal generating device;

the testing device is connected with the light source signal generating device and determines the frequency of the target generator based on the target on-screen frequency of the to-be-tested augmented reality device;

The test equipment is further connected with the to-be-tested augmented reality equipment during testing, and is used for controlling the light source signal generating device to generate scintillation stripes with the target generator frequency, obtaining first delay distribution based on the received time corresponding to the scintillation stripes transmitted by the light source signal generating device and the received time corresponding to the collected scintillation stripe images transmitted by the to-be-tested augmented reality equipment under the condition that the light source signal generating device generates the scintillation stripes with the target generator frequency, and obtaining second delay distribution based on the required test mode and the target generator frequency under the condition that the light source signal generating device and the to-be-tested augmented reality equipment are in the same frequency.

According to the delay time measurement system provided by the embodiment of the invention, the target generator frequency corresponding to the light source signal generation device is determined through the target on-screen frequency of the to-be-measured augmented reality device, so that the time for generating the flicker stripe by the light source signal generation device is synchronous with the on-screen time frequency of the augmented reality device, and the phase difference is constant, thereby coping with delay fluctuation of the flicker stripe and the on-screen time point caused by beat frequency abnormality, and improving the stability of data and the test precision in the measurement process; under the condition that the light source signal generating device generates scintillation stripes based on the target generator frequency, the to-be-tested augmented reality device acquires images of the scintillation stripes, after the first time is determined based on the received scintillation stripes transmitted by the light source signal generating device and the second time is determined based on the acquired images transmitted by the to-be-tested augmented reality device, the test is carried out based on the target generator frequency determined by the target on-screen frequency, the generated data is used for calculating to obtain the first delay distribution of the to-be-tested augmented reality device, the movement of the light source on-screen time point in the on-screen frequency period is effectively avoided, the beat frequency error is caused, the accuracy of the test delay time is improved, and the whole process from capturing a real scene to on-screen after the intermediate link processing is considered based on the delay distribution determined by the method, so that the test method has universality.

In a sixth aspect, the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the delay time measurement method according to the first aspect and the target on-screen frequency determination method according to the third aspect when executing the computer program.

In a seventh aspect, the present invention provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the delay time measurement method as described in the first aspect and the target on-screen frequency determination method as described in the third aspect.

In an eighth aspect, the present invention provides a computer program product comprising a computer program which, when executed by a processor, implements the delay time measurement method as described in the first aspect and the target on-screen frequency determination method as described in the third aspect.

The above technical solutions in the embodiments of the present invention have at least one of the following technical effects:

the target generator frequency corresponding to the light source signal generating device is determined through the target screen frequency of the to-be-detected augmented reality equipment, so that the time of generating the flicker stripe by the light source signal generating device is synchronous with the screen time frequency of the augmented reality equipment, the phase difference is constant, delay fluctuation of the flicker stripe and the screen time point caused by beat frequency abnormality is solved, and the stability of data and the testing precision in the measuring process are improved; under the condition that the light source signal generating device generates scintillation stripes based on the frequency of the target generator, the to-be-tested augmented reality device acquires images of the scintillation stripes, after the first time is determined based on the received scintillation stripes transmitted by the light source signal generating device and the second time is determined based on the acquired images transmitted by the to-be-tested augmented reality device, the second delay distribution is obtained by making the difference between the first time and the second time, the beat frequency error caused by the movement of the light source lighting time point in the upper screen frequency period is effectively avoided, the accuracy of the test delay time is improved, and the whole process from capturing a real scene to the upper screen after the intermediate link processing is considered based on the delay distribution determined by the method.

Further, the light source signal generating device is controlled to generate the scintillation stripes through the first advanced delay and the frequency of the target generator, the second delay distribution is obtained based on the received third time and the second time of the scintillation stripes transmitted by the scintillation stripes generated by the light source signal generating device through the first advanced delay and the frequency of the target generator, whether abnormal conditions exist in the test process or not can be effectively judged based on the obtained second delay distribution of the determined numerical value, and therefore the test process is adjusted based on abnormal information displayed by the second delay distribution, the first delay distribution is optimized, accuracy of the obtained delay information is improved, and errors of test results are reduced.

Furthermore, by setting random advanced delay and controlling the light source signal generating device to generate flickering stripes based on the random advanced delay and the frequency of the target generator, the time point of the light source on the screen of the augmented reality equipment is changed to correspond to the time point in each frame of the screen of the augmented reality equipment, the influence of exposure adjustment of the augmented reality equipment on PTP delay is effectively considered, accurate delay distribution of the augmented reality equipment is obtained, and accuracy of obtaining delay time is improved.

Further, the target test frequency of the light source signal generating device is effectively obtained by adopting a frequency approximation method through the initial screen frequency and the target step length of the acquired to-be-detected augmented reality equipment; the method comprises the steps of testing a light source signal generating device controlled based on target test frequency and an initial on-screen frequency controlled augmented reality device to obtain two delay distributions, and effectively calculating to obtain target on-screen frequency based on data corresponding to the obtained delay distributions.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic flow chart of a delay time measurement method according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a delay time measurement method according to an embodiment of the present invention;

fig. 3 is a flowchart of a method for determining a target on-screen frequency according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a target on-screen frequency determining method according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a second embodiment of a method for determining a target on-screen frequency;

FIG. 6 is a third schematic diagram of a target on-screen frequency determining method according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a target on-screen frequency determining method according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a delay time measurement system according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a delay time measurement device according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a target on-screen frequency determining device according to an embodiment of the present invention;

Fig. 11 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;

fig. 12 is a second flowchart of a delay time measurement method according to an embodiment of the invention.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which are obtained by a person skilled in the art based on the embodiments of the present invention, fall within the scope of protection of the present invention.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present invention may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type, and are not limited to the number of objects, such as the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

The delay time measuring method, the delay time measuring device, the electronic equipment and the readable storage medium provided by the embodiment of the invention are described in detail below through specific embodiments and application scenes thereof with reference to the accompanying drawings.

The delay time measuring method can be applied to the terminal, and can be specifically executed by hardware or software in the terminal.

The terminal includes, but is not limited to, a portable communication device such as a mobile phone or tablet computer. It should also be appreciated that in some embodiments, the terminal may not be a portable communication device, but rather a desktop computer.

In the following various embodiments, a terminal including a display and a touch sensitive surface is described. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, mouse, and joystick.

The execution main body of the delay time measurement method provided by the embodiment of the invention can be an electronic device or a functional module or a functional entity capable of realizing the delay time measurement method in the electronic device, and the electronic device provided by the embodiment of the invention comprises, but is not limited to, a mobile phone, a tablet computer, a camera, a wearable device and the like.

As shown in fig. 1, the delay time measurement method includes: step 110, step 120, step 130 and step 140.

The delay time measuring method is applied to a delay time measuring system.

As shown in fig. 8, the delay time measurement system includes a light source signal generating device and a test apparatus 840.

The light source signal generating means includes a signal generator 810 and a light source 820.

The signal generator 810 is connected to the light source 820.

The signal generator 810 controls the light source 820 to blink based on a certain frequency, thereby generating a blinking stripe.

The light source 820 is disposed in front of the augmented reality device 830 under test.

The augmented reality device 830 to be measured is fixed to a fixed head die.

The augmented reality device under test 830 is used to capture images of the scintillation stripes.

The light source signal generating means is for generating a scintillation stripe based on a target generator frequency determined by a target on-screen frequency of the augmented reality device 830 to be measured.

Step 110, determining a target generator frequency corresponding to the light source signal generating device based on the target on-screen frequency of the to-be-detected augmented reality device 830;

in this step, the augmented reality device 830 to be measured is an augmented reality device whose delay time needs to be determined.

The target on-screen frequency is the calculated accurate on-screen frequency of the augmented reality device to be measured 830, and can be expressed as。

It is appreciated that the target on-screen frequency may be the frame rate of the augmented reality device 830 under test in VST (Video-see-through) perspective mode.

The light source signal generating device is a device for generating a flicker stripe based on a certain frequency.

In an actual implementation, the signal generator 810 controls the light source 820 to blink based on a certain frequency, thereby generating a blinking stripe.

The target generator frequency is the flicker frequency of the light source signal generating device, and can be expressed as。

In the actual execution process, after the target on-screen frequency of the to-be-detected augmented reality device 830 is obtained, the target generator frequency can be determined based on the target on-screen frequency, so as to realize the same frequency of the light source signal generating device in the current state and the currently calculated frequency of the to-be-detected augmented reality device 830. In the actual implementation process, the frequency of the target generator is enabled to be similar to the frequency of the target on-screen frequency or equal to the frequency of the target on-screen frequency, and the specific similar numerical range is determined according to the actual requirement.

Step 120, under the condition that the light source signal generating device generates a flicker stripe based on the frequency of the target generator, obtaining a first time delay distribution based on a first time corresponding to the flicker stripe transmitted by the received light source signal generating device and a second time corresponding to the acquired image transmitted by the received to-be-detected augmented reality device 830;

In this step, the flicker stripe is a flicker stripe generated by the signal generator 810 in the light source signal generating device controlling the flicker of the light source 820 based on the target generator frequency. The test device 840 is a device that tests the extended reality device latency.

In the actual implementation process, under the condition that the light source signal generating device generates the scintillation stripes, the to-be-tested augmented reality device 830 can acquire the scintillation stripes through the built-in image sensor to obtain image information.

The first time is the time corresponding to the test device 840 receiving the signal (such as the blinking stripe signal) sent by the light source signal generating device.

The second time is a time corresponding to the test device 840 receiving the acquisition signal (e.g., the signal corresponding to the acquisition scintillation stripe) sent by the augmented reality device.

The first delay profile is a delay profile obtained by testing the augmented reality device to be tested 830 based on the target generator frequency.

It will be appreciated that it may be determined whether the target generator frequency is equal to the actual screen frequency of the augmented reality device 830 under test by the slope corresponding to the first delay profile. It will be appreciated that in the case where the slope of the resulting first delay profile is less than a given target threshold, the light source signal generating device is considered co-frequency with the augmented reality device 830 under test.

In practice, the screen frequency is the actual screen frequency of the augmented reality device 830 to be tested during operation.

In actual execution, the slope of the first delay profile characterizes the frequency difference. The target threshold is a preset value for determining beat frequency anomalies. It is understood that the target threshold may be determined based on actual execution, for example, the target threshold may be 0.00083 or 0.00085.

In the case where the slope corresponding to the first delay profile is not less than the target threshold, the target generator frequency is considered to be unequal to the actual screen frequency of the augmented reality device 830 to be measured.

In the case where the slope corresponding to the first delay profile is less than the target threshold, the target generator frequency is considered to be equal to the actual screen frequency of the augmented reality device 830 to be measured.

It will be appreciated that in the case where the target generator frequency of the light source signal generating device is set equal to the target on-screen frequency, the slope of the first delay profile resulting from the test is less than the given target threshold, and the target on-screen frequency may be considered to be the actual on-screen frequency, so that the target generator frequency is equal to the actual on-screen frequency.

In the actual implementation process, after determining the frequency of the target generator in step 110, controlling the light source signal generating device to generate a scintillation stripe based on the frequency of the target generator, where the light source signal generating device sends the scintillation stripe signal to the test device 840 through the optical fiber, the time when the test device 840 receives the scintillation stripe signal transmitted by the light source signal generating device is a first time, the to-be-detected augmented reality device 830 sends the acquisition signal to the test device 840 through the optical fiber, the time when the test device 840 receives the acquisition signal transmitted by the to-be-detected augmented reality device 830 is a second time, and calculating to obtain the first delay distribution of the to-be-detected augmented reality device 830 based on the first time and the second time. It will be appreciated that the first time delay profile may be obtained by the time difference between the intensity of light becoming stronger, and also by the time difference between the intensity of light becoming weaker.

The light source signal generating device and the expansion display device to be tested respectively transmit signals to the test device 840 through optical fibers, and the characteristics of high optical fiber transmission efficiency and low time delay can be utilized to achieve two paths of composite one-path transmission so as to realize synchronous transmission and avoid the influence of time difference in two paths of transmission links.

Meanwhile, it can be understood that in the case that the frequency of the target generator is equal to the frequency of the target on-screen, the acquired first delay distribution has theoretically eliminated the PTP delay variation period caused by beat frequency abnormality.

In the actual execution process, a flicker measurement mode of the Admesy measuring instrument is started, the acquisition time is set to be 5min, data of the light intensity change along with time acquired by the Admesy measuring instrument are stored, and after the data are processed, PTP delay distribution in a normal operation mode shown in fig. 2 can be obtained, wherein the target on-screen frequency corresponding to the delay distribution is 89.999711HZ, the minimum delay is 41.16ms, the maximum delay is 65.94, and the average delay is 53.48.

Step 130, under the condition that the frequency of the target generator meets the set requirement based on the first delay distribution, controlling the light source signal generating device to generate a flicker stripe based on the required test mode and the frequency of the target generator, and controlling the to-be-tested augmented reality device 830 to acquire an image of the flicker stripe;

the set requirement may be that the target generator frequency is equal to the actual screen frequency of the augmented reality device 830 under test.

The set requirement is met such that the current target generator frequency is equal to the actual screen frequency of the augmented reality device 830 to be tested.

The required test patterns include: beat frequency pattern, random phase pattern, and specific phase pattern.

In the actual implementation process, under the condition that the target generator frequency is determined to be equal to the actual screen frequency of the to-be-tested augmented reality device 830 (i.e., the set requirement is met), a test is performed on the to-be-tested augmented reality device 830 for a period of time based on the target generator frequency (the test process may include three different test modes), so as to obtain an accurate delay distribution, where the accurate delay distribution may include delay distributions in three modes.

In the testing process, the light source signal generating device is controlled to generate scintillation stripes based on the frequency of the target generator, and the to-be-tested augmented reality device 830 is controlled to acquire images of the scintillation stripes, the light source signal generating device transmits the scintillation stripes to the testing device 840 through the optical fibers, and the to-be-tested augmented reality device 830 also transmits the acquired images to the testing device 840 through the optical fibers.

It will be appreciated that after determining that the target generator frequency is equal to the actual screen frequency, an overall measurement system may be built based on the acquired data. In the actual process, an integral measurement system is built, each device needs to be placed according to a specified position, the augmented reality device is placed in front of the LED light source, and the distance between the augmented reality device and the LED light source can be 30mm.

The dual optical fibers of the transmission module are installed, wherein the input port of one optical fiber is aligned with the center of the line parallel light stripe after the light source 820 emits homogenization; the input port of the other optical fiber is fixed at the rear of the augmented reality equipment and is aligned with a single-path display screen of the augmented reality equipment so as to collect the intensity change of the scintillation stripes in the VST mode.

The output port of the dual optical fibers is fixed to ensure that the light beam can completely enter the testing device 840, and the Admesy measuring instrument can be selected to measure the light beam in this embodiment.

In the actual implementation process, when the target generator frequency of the light source signal generating device is set to be equal to the target on-screen frequency and the slope corresponding to the first delay distribution obtained by testing is smaller than the target threshold value, the frequency of the light source signal generating device can be set to beThe light source 820 is illuminated, each time the light source 820 is illuminated in synchronization with the augmented reality device opto-mechanical refresh cycle, wherein/>For the target generator frequency,/>For the target on-screen frequency.

It will be appreciated that the distribution of PTP delay over run time for an augmented reality device is ideally a horizontal scatter distribution after the light source signal generating device frequency controls the light source 820 frequency to approach the on-screen frequency of the augmented reality device.

After the whole measurement system is built, information corresponding to the scintillation stripes is acquired based on the system.

In the actual implementation process, information corresponding to the scintillation stripes generated by the light source signal generating device and information of image acquisition of the scintillation stripes by the to-be-detected augmented reality device 830 can be acquired.

Step 140, calculating to obtain a second delay distribution of the to-be-detected augmented reality device 830 based on the third time corresponding to the scintillation stripe transmitted by the received light source signal generating device and the fourth time corresponding to the acquired image transmitted by the received to-be-detected augmented reality device 830.

In this step, the second delay profile is the resulting accurate delay profile of the augmented reality device to be measured 830. It will be appreciated that the resulting second delay profile eliminates beat anomalies.

It will be appreciated that during actual execution, the augmented reality device under test 830 may be tested by different testing procedures, so as to obtain a second delay profile of different modes later.

In the actual execution process, the test device 840 receives the collected image transmitted by the light source signal generating device through the scintillation stripe transmitted by the optical fiber and the to-be-tested augmented reality device 830, can obtain the third time based on the time corresponding to the scintillation stripe transmitted by the received light source signal generating device, can obtain the fourth time based on the time corresponding to the collected image transmitted by the received to-be-tested augmented reality device 830, and makes a difference between the third time and the fourth time to obtain the second delay distribution.

It will be appreciated that the third and fourth times herein, like the first and second times described above, are equally representative of two time values obtained when the intensity of light is increased or decreased, and are represented herein in terms of third and fourth aspects, only for the purpose of distinguishing between the first and second times, where there is no positional or sequential relationship.

According to the delay time measuring method provided by the embodiment of the invention, the target generator frequency corresponding to the light source signal generating device is determined through the target on-screen frequency of the to-be-measured augmented reality equipment 830, so that the time of generating the flicker stripe by the light source signal generating device is synchronous with the on-screen time frequency of the augmented reality equipment, and the phase difference is constant, thereby coping with delay fluctuation of the flicker stripe and the on-screen time point caused by beat frequency abnormality, and improving the stability of data and the test precision in the measuring process; under the condition that the light source signal generating device generates the flicker stripe based on the frequency of the target generator, the to-be-tested augmented reality device 830 is enabled to acquire the image of the flicker stripe, after the third time is determined based on the flicker stripe transmitted by the received light source signal generating device and the fourth time is determined based on the acquired image transmitted by the to-be-tested augmented reality device 830, the second delay distribution is obtained by making a difference between the third time and the fourth time, so that the beat frequency error caused by the movement of the light source 820 in the upper screen frequency period is effectively avoided, the accuracy of testing the delay time is improved, and the whole process from capturing the real scene to the upper screen after the intermediate link processing is considered based on the delay distribution determined by the method, so that the testing method has universality.

The test procedure in the three modes is described below with reference to fig. 12.

One of the beat frequency modes

In some embodiments, controlling the light source signal generating device to generate the scintillation stripe based on the desired test pattern and the target generator frequency may further comprise:

Under the condition that the required test mode is a beat frequency mode, determining a target generator frequency corresponding to the light source signal generating device based on the initial step length and the target screen-on frequency;

the light source signal generating device is controlled to generate a scintillation stripe based on the target generator frequency.

In this embodiment, the initial step size is a step size for adjusting the target on-screen frequency.

The actual value of the initial step may be determined based on the actual situation, and the present invention is not limited.

The initial step size may beOr/>. For example, the initial step size may be-0.05 HZ, +0.05HZ, -0.01HZ, and-0.02 HZ, etc.

The target generator frequency in the beat frequency mode is the frequency obtained by adding the initial step to the target generator frequency equal to the actual screen frequency of the augmented reality device to be measured 830, which is determined by the first delay profile obtained by step 120.

It will be appreciated that the target generator frequency may be the sum of the target on-screen frequency and the initial step size determined directly in step 110; or it may be the addition of the new target generator frequency resulting from fine tuning the target generator frequency determined in step 110 to the initial step size.

In the actual implementation process, after determining the target on-screen frequency or the new target generator frequency and the initial step length, the initial step length and the target on-screen frequency may be added or the new target generator frequency and the target on-screen frequency may be added to obtain the target generator frequency, for example, the target generator frequency may beThereby controlling the light source signal generating means based on the target generator frequency.

For example, in the case where the target screen frequency is the actual screen frequency, the frequency of the light source signal generating means is set toThe output pulse signal controls the light source signal generating device to emit light in a line parallel mode after passing through the light homogenizing and slit, so that long-time measurement is carried out later, and PTP time delay distribution (namely second time delay distribution in the beat frequency mode) in the beat frequency mode is obtained according to the change of the collected scintillation light source intensity along with time.

According to the delay time measuring method provided by the embodiment of the invention, the target generator frequency of the light source signal generating device is determined through the initial step length and the target on-screen frequency, so that the to-be-measured augmented reality equipment 830 is tested based on the target generator frequency in the test process, and the delay distribution in the beat frequency mode is obtained later.

Two-phase, random phase pattern

And under the condition that the required test mode is a random phase mode, controlling the light source signal generating device to generate flickering stripes based on the random lead delay and the target generator frequency.

In this embodiment, the random lead delay is a random value within the target period.

The target period is determined based on the target on-screen frequency.

The target period may be [0, T ], where T may be determined based on the target on-screen frequency.

The target generator frequency in the random phase mode is the target generator frequency equal to the actual screen frequency of the augmented reality device to be measured 830 as determined by the first delay profile obtained in step 120.

It will be appreciated that the target generator frequency may be the target on-screen frequency determined directly in step 110; or possibly a new target generator frequency resulting from fine tuning the target generator frequency determined in step 110.

In the actual execution process, the light source signal generating device is controlled based on the frequency of the target generator, the pulse delay of the light source signal generating device is controlled based on the random quantity corresponding to the random advanced delay (LEAD DELAY), and the light source signal generating device is controlled to generate scintillation stripes based on the setting condition, so that the long-time measurement is carried out on the to-be-measured augmented reality equipment 830 subsequently, and the second delay distribution under the random phase model is obtained.

In the actual execution process, the signal generator 810 is set to have the frequency of the target on-screen frequencyAdjusting the phase of the test event to a random value of [0, T ], wherein/>The output pulse signal controls the light source 820 to flash, which is emitted in a line parallel light after passing through the light homogenizing and slit, and measured for a long time, and the PTP delay distribution in the random phase mode (i.e., the second delay distribution in the random phase mode) is obtained according to the collected change of the intensity of the flash light source with time.

It can be appreciated that the starting time of capturing object changes in the VST screen during normal operation of the augmented reality device corresponds to different time points in each cycle of the optical engine of the augmented reality device, so that random Delay needs to be added.

According to the delay time measuring method provided by the embodiment of the invention, the random advanced delay is set, and the light source signal generating device is controlled to generate the flickering stripes based on the random advanced delay and the frequency of the target generator, so that the time point of the light source 820 corresponding to the time point in each frame of the screen of the augmented reality device is changed, the influence of the exposure adjustment of the augmented reality device on the PTP delay is effectively considered, the accurate delay distribution of the augmented reality device in the random phase mode is obtained, and the accuracy of acquiring the delay time is improved.

Third, specific phase pattern

and controlling the light source signal generating device to generate a flicker stripe based on the target generator frequency, the first lead delay, the target period and the target time interval under the condition that the required test mode is a specific phase mode.

In this embodiment, the first lead delay is a lead delay that increases in order by a fixed step based on an initial value in one cycle.

The target time interval is the time interval of the first advanced delay value change.

The target time interval may be determined based on actual execution conditions, which is not limited by the present invention; for example, the target time interval may be 5ms or 10ms.

The target generator frequency in a particular phase pattern is also the target on-screen frequency determined by the first delay profile obtained in step 120 that is equal to the actual on-screen frequency of the augmented reality device 830 under test.

The target generator frequency is the frequency of the light source signal generating device, i.e. the actual screen frequency (the target generator frequency determined by the slope of the first delay profile being smaller than the target threshold value) in case the light source signal generating device is co-frequency with the augmented reality device to be measured 830.

The specific value of the target generator frequency may be determined based on the target on-screen frequency.

In the actual execution process, the signal generator 810 is set to have the frequency of the target on-screen frequencyMeasuring for multiple times, respectively adjusting the phase of the test event to 0~T, wherein each time the adjustment interval is/>WhereinThe output pulse signal controls the light source 820 to flash, which is emitted in a line parallel light after passing through the light homogenizing and slit, and measured for a long time, and the PTP delay distribution in each different specific phase mode (i.e., the second delay distribution in the specific phase mode) is obtained according to the change of the collected scintillation light source intensity with time.

In the actual implementation process, for example, under the condition that the light source signal generating device is set to the target generator frequency, the pulse lead delay initial value of the signal generator 810 is 0ms, the test is started, the first lead delay is increased by 1ms every 5s until the first lead delay reaches the maximum value in the target period, so that the long-time measurement is performed on the to-be-measured augmented reality device 830 subsequently, and the second delay distribution under the specific phase model is obtained.

According to the delay time measuring method provided by the embodiment of the invention, the light source signal generating device with the frequency being the frequency of the target generator is used for testing the to-be-tested real expansion equipment, and the first advanced delay is changed within a fixed time interval in the test process, so that the first delay distribution under different specific phase modes is obtained subsequently based on the test process.

In some embodiments, after obtaining the first delay profile, the method further comprises:

And under the condition that the frequency of the target generator does not meet the set requirement based on the first delay distribution, adjusting the frequency of the target generator, and returning to execute the first delay distribution based on the first time corresponding to the received flicker stripe transmitted by the light source signal generating device and the second time corresponding to the received acquired image transmitted by the to-be-detected augmented reality device 830 under the condition that the flicker stripe is generated by the light source signal generating device based on the frequency of the target generator.

In this embodiment, the set requirement is not met as the current target generator frequency is not equal to the actual screen frequency of the augmented reality device 830 under test.

It will be appreciated that in practice the screen frequency may be equal to or slightly different from the target screen frequency.

The relationship between the target generator frequency and the actual screen frequency of the augmented reality device to be measured 830 may be determined by the absolute value of the slope of the resulting first delay profile.

In the case that the absolute value of the slope of the first delay profile is not 0 or not less than the target threshold, it may be considered that the target generator frequency is not equal to the actual screen frequency of the augmented reality device to be measured 830, and at this time, the target generator frequency needs to be fine-tuned so that the target generator frequency is equal to the actual screen frequency of the augmented reality device to be measured 830 (i.e., meets the set requirement).

The specific value of the target generator frequency may be calculated based on the target on-screen frequency and the size of each fine tuning and the number of fine tuning.

And under the condition that the absolute value of the slope of the first delay distribution is not smaller than the target threshold value, finely adjusting the frequency of the target generator, and returning to execute the step of obtaining the first delay distribution based on the first time corresponding to the received flicker fringe transmitted by the light source signal generating device and the second time corresponding to the acquired image transmitted by the to-be-detected augmented reality device 830 under the condition that the light source signal generating device generates the flicker fringe based on the frequency of the target generator, thereby obtaining a new first delay distribution, and under the condition that the frequency of the target generator is determined to be equal to the actual screen frequency of the to-be-detected augmented reality device 830 based on the new first delay distribution, testing can be performed based on a required test mode, and the beat frequency mode, the random phase mode and the second delay distribution under the specific phase mode are obtained.

After fine tuning the target generator frequency, if the slope of the obtained new first delay profile is still not less than the target threshold, the target generator frequency is still not equal to the actual screen frequency of the augmented reality device 830 to be measured, and fine tuning the frequency of the target generator is continued until the slope of the new first delay profile is less than the target threshold.

In the actual implementation process, the trimming target generator frequency may be increased or decreased by a certain value based on the current target generator frequency, and the value range may be: of course, the magnitude of the fine tuning may be specifically determined according to practical needs, and is not limited herein.

It will be appreciated that after trimming, the target generator frequency in each mode will be different from the target on-screen frequency and each mode will test the extended display device under test based on the new target generator frequency after trimming.

As shown in fig. 12, in the case where it is determined that the target generator frequency of the light source signal generating device is not equal to the actual screen frequency of the to-be-measured augmented reality device 830 based on the PTP delay distribution obtained by the measurement (i.e., the set requirement is not satisfied), the target generator frequency is fine-tuned, the test is performed again based on the adjusted target generator frequency, and in the case where it is determined that the target generator frequency of the light source signal generating device is equal to the actual screen frequency of the to-be-measured augmented reality device 830 based on the new first delay distribution obtained by the retest, at this time, a desired test mode (i.e., the beat mode, the random phase mode, and the specific phase mode) can be selected according to the test requirement of the user, thereby obtaining the second delay distribution in the test mode.

According to the delay time measurement method provided by the self-application embodiment, whether the frequency of the target generator is accurate is determined through the obtained first delay distribution, and under the condition of inaccuracy, the frequency of the target generator is finely adjusted, so that the light source signal generating device and the to-be-measured augmented reality equipment 830 are co-frequency, and the accuracy of the subsequently obtained first delay distribution is improved.

According to the delay time measuring method provided by the embodiment of the invention, the execution main body can be a delay time measuring device. In the embodiment of the invention, the delay time measuring device provided by the embodiment of the invention is described by taking the method for executing the delay time measurement by the delay time measuring device as an example.

The embodiment of the invention also provides a delay time measuring device.

The delay time measuring device is applied to a delay time measuring system.

The delay time measurement system comprises a light source signal generating device.

As shown in fig. 9, the delay time measuring apparatus includes: a signal determination module 910, a delay test module 920, a signal control module 930, and a delay profile determination module 940.

A signal determining module 910, configured to determine a target generator frequency corresponding to the light source signal generating device based on the target on-screen frequency of the to-be-detected augmented reality device 830;

the delay test module 920 is configured to obtain a first delay distribution based on a first time corresponding to the received scintillation stripe transmitted by the light source signal generating device and a second time corresponding to the received acquired image transmitted by the to-be-detected augmented reality device 830 when the light source signal generating device generates the scintillation stripe based on the target generator frequency;

The signal control module 930 is configured to, when determining, based on the first delay distribution, that the target generator frequency meets the set requirement, control the light source signal generating device to generate a scintillation stripe based on the required test mode and the target generator frequency, and control the to-be-tested augmented reality device 830 to perform image acquisition on the scintillation stripe;

The delay distribution determining module 940 is configured to calculate, based on the third time corresponding to the scintillation stripe transmitted by the received light source signal generating device and the fourth time corresponding to the acquired image transmitted by the received augmented reality device to be detected 830, a second delay distribution of the augmented reality device to be detected 830.

According to the delay time measuring device provided by the embodiment of the invention, the target generator frequency corresponding to the light source signal generating device is determined through the target on-screen frequency of the to-be-measured augmented reality equipment 830, so that the time of generating the flicker stripe by the light source signal generating device is synchronous with the on-screen time frequency of the augmented reality equipment, and the phase difference is constant, thereby coping with delay fluctuation of the flicker stripe and the on-screen time point caused by beat frequency abnormality, and improving the stability of data and the test precision in the measuring process; under the condition that the light source signal generating device generates the flicker stripe based on the frequency of the target generator, the to-be-tested augmented reality device 830 is enabled to acquire the image of the flicker stripe, after the third time is determined based on the flicker stripe transmitted by the received light source signal generating device and the fourth time is determined based on the acquired image transmitted by the to-be-tested augmented reality device 830, the second delay distribution is obtained by making a difference between the third time and the fourth time, so that the beat frequency error caused by the movement of the light source 820 in the upper screen frequency period is effectively avoided, the accuracy of testing the delay time is improved, and the whole process from capturing the real scene to the upper screen after the intermediate link processing is considered based on the delay distribution determined by the method, so that the testing method has universality.

In some embodiments, the signal control module 930 may also be configured to:

Under the condition that the required test mode is a random phase mode, controlling the light source signal generating device to generate flickering stripes based on random lead delay and the frequency of the target generator; the random lead delay is a random value within a target period, the target period being determined based on a target on-screen frequency.

In some embodiments, the signal control module 930 may also be configured to:

In some embodiments, delay test module 920 may also be configured to:

And under the condition that the frequency of the target generator does not meet the set requirement based on the first delay distribution, adjusting the frequency of the target generator, and returning to execute the first delay distribution based on the first time corresponding to the received flicker stripe transmitted by the light source signal generating device and the second time corresponding to the received acquired image transmitted by the to-be-detected augmented reality device 830 under the condition that the flicker stripe is generated by the light source signal generating device based on the frequency of the target generator. The embodiment of the invention also provides a target on-screen frequency determining method based on the delay time measuring method according to any embodiment.

As shown in fig. 3, the method for determining the target on-screen frequency includes: step 310, step 320 and step 330.

Step 310, collecting an initial on-screen frequency of the augmented reality device 830 to be tested;

in this step, the initial on-screen frequency is a rough value of the on-screen frequency of the augmented reality device 830 to be measured.

The initial on screen frequency can be expressed as（Head-Mounted Display，HMD）。

The initial screen frequency can be obtained through the detection equipment; for example, the detection device may be Admesy gauge.

Of course, the initial on-screen frequency may also be acquired in any other realizable manner.

In the actual execution process, the frame rate of the augmented reality device in the VST mode can be determined through the light intensity measuring device, and a rough frame rate value and a fluctuation range thereof are obtained.

In the actual execution process, as shown in fig. 4, the condition that the brightness of the optical machine of the to-be-detected expansion display device changes along with time is shown, the refresh frequency result of the actually measured optical machine of the adopted expansion reality device is about 90HZ, and the refresh frequency is a rough value and can be an integer value.

It can be understood that the rough measurement frequency is not high in precision and is four bits after the decimal point, so that the accurate frequency needs to be calculated through a subsequent self-adaptive method, and the precision can reach six bits after the decimal point.

Step 320, adjusting the initial on-screen frequency based on the target step length to obtain the target test frequency of the light source signal generating device;

in this step, the target step size is a value that adjusts the initial on-screen frequency.

The target step length can be determined based on actual conditions, and the invention is not limited; for example, the target step size may be +5 or-5.

The target test frequency is the test frequency of the light source signal generating device in the process of calculating the accurate on-screen frequency of the to-be-detected augmented reality device 830.

It will be appreciated that the target step sizes will be different and the resulting target test frequencies will be different. In the actual execution process, after the initial on-screen frequency is obtained, the initial on-screen frequency is adjusted based on the target step length, and the target test frequency of the light source signal generating device is obtained.

In some embodiments, the target step size comprises a first step size and a second step size, and the target test frequency comprises a first test frequency and a second test frequency; step 320 may further include:

based on the first step length, adjusting the initial screen frequency to obtain a first test frequency of the light source signal generating device;

And based on the second step length, adjusting the initial screen frequency to obtain a second test frequency of the light source signal generating device.

In this embodiment, the first step size is a step size that decrements the initial on-screen frequency. The first step size can be expressed asThe first step size may be-0.05 HZ or-0.03 HZ.

The second step size is a step size for incrementally adjusting the initial on-screen frequency. The second step size can be expressed asThe second step size may be +0.05hz or +0.03hz.

The first test frequency is a test frequency of the light source signal generating device determined based on the first step size and the initial on-screen frequency. The first test frequency may be expressed as。

The second test frequency is a test frequency of the light source signal generating device determined based on the second step size and the initial on-screen frequency. The first test frequency may be expressed as。

It is understood that the absolute values of the first step size and the second step size may be equal.

In the actual execution process, after determining a first step length and an initial screen frequency, a first test frequency can be calculated; after determining the second step size and the initial on-screen frequency, a second test frequency may be calculated.

According to the target on-screen frequency determining method provided by the self-application embodiment, the target test frequency of the light source signal generating device can be determined through the first step length, the second step length and the initial on-screen frequency in the target step length, two groups of test data are effectively acquired, the time that the movement amount caused by beat frequency exceeds one frame is avoided through the frequency approximation method based on the target step length, accurate test data are provided for the accurate on-screen frequency of the follow-up computing augmented reality device, accuracy of a computing result is improved, and errors are reduced.

Step 330, calculating the target on-screen frequency of the to-be-tested augmented reality device 830 based on the delay distribution obtained by controlling the light source signal generating device by the target test frequency and controlling the to-be-tested augmented reality device 830 by the initial on-screen frequency.

The target on-screen frequency is the accurate on-screen frequency of the augmented reality device 830 to be measured.

In the actual execution process, the light source signal generating device can be set to output a square wave with the duty ratio of 50%, after the first test frequency of the light source signal generating device is determined based on the first step length and the initial screen frequency, the light source signal generating device is controlled to generate flickering stripes at the first test frequency, so that the light and shade state is switched after each time the light source signal generating device receives the initial screen frequency, namely, the light is turned onSecond, kill/>Second, the cycle is sequentially performed.

The beat frequency causes the movement amount of the time point of the adjacent two times of the light source lighting in each frame of the augmented reality equipment to beSecond.

Based on the test process, the PTP delay fluctuation condition in 0.5min under the first test frequency state can be obtained.

The same setting light source signal generating device outputs square wave with duty ratio of 50%, after determining the second test frequency of the light source signal generating device based on the second step length and the initial screen frequency, repeating the test process corresponding to the first test frequency, and obtaining the PTP delay fluctuation condition in 0.5min under the second test frequency state.

After obtaining the delay profile based on the control of the light source signal generating device by the target test frequency and the control of the augmented reality device under test 830 by the initial on-screen frequency, the target on-screen frequency of the augmented reality device under test 830 may be calculated based on the data in the delay profile.

According to the target on-screen frequency determining method provided by the embodiment of the invention, the target test frequency of the light source signal generating device is effectively obtained by adopting a frequency approximation method through the initial on-screen frequency and the target step length of the acquired to-be-detected augmented reality equipment 830; the method comprises the steps of testing a light source signal generating device controlled based on target test frequency and an initial on-screen frequency controlled augmented reality device to obtain two delay distributions, and effectively calculating to obtain target on-screen frequency based on data corresponding to the obtained delay distributions.

In some embodiments, step 330 may further comprise:

calculating a first slope based on a first initial distribution obtained by controlling the light source signal generating device by a first test frequency and controlling the augmented reality device 830 to be tested by an initial on-screen frequency;

calculating a second slope based on a second initial distribution obtained by controlling the light source signal generating device by a second test frequency and controlling the augmented reality device to be tested 830 by an initial on-screen frequency;

In this embodiment, the first initial distribution is a delay distribution of the to-be-tested augmented reality device 830 obtained by testing the to-be-tested augmented reality device 830 based on the first test frequency control light source signal generating device.

The first slope is the slope corresponding to the first initial distribution.

The second initial distribution is a delay distribution of the to-be-tested augmented reality device 830 obtained by testing the to-be-tested augmented reality device 830 based on the second test frequency control light source signal generating device.

The second slope is the slope corresponding to the second initial distribution.

In the actual execution process, the two test data are processed, and fitting slopes of the two tests are respectively counted, so that the time delay distribution shown in fig. 5 and fig. 6 can be obtained.

It can be seen that the delay profile corresponding to the first test frequency determined based on the first step size is a decreasing linear function profile as shown in fig. 5, wherein the first test frequency used is 89.95HZ during the test.

The delay profile corresponding to the second test frequency determined based on the second step size is an incremental linear function profile as shown in fig. 6, wherein the second test frequency used during the test is 90.05HZ.

In the actual execution process, after two delay distributions are obtained, data in the delay distributions can be processed, and fitting slopes of the two tests are respectively counted to obtain a first slope and a second slope.

After the first slope and the second slope are obtained, a target on-screen frequency may be calculated based on the obtained slopes.

According to the target on-screen frequency determining method provided by the embodiment of the invention, the light source signal generating device controlled by the first test frequency and the to-be-detected augmented reality device 830 controlled based on the initial on-screen frequency are tested to obtain a first initial distribution, and a first slope is obtained based on the first initial distribution; testing the light source signal generating device controlled by the second test frequency and the to-be-tested augmented reality equipment 830 controlled based on the initial on-screen frequency to obtain second initial distribution, and calculating to obtain a second slope based on the second initial distribution; and calculating the target on-screen frequency based on the first slope and the second slope, carrying out statistical analysis on the test data through twice test data, effectively obtaining data required by calculating the target on-screen frequency, and improving the accuracy of a calculation result.

In some embodiments, calculating the target on-screen frequency based on the first slope and the second slope may further include:

a second relationship is constructed based on the second slope, the second test frequency, the initial on-screen frequency and the target on-screen frequency,

In this embodiment, the first relationship is a relationship constructed based on the data included in the first initial distribution.

The second relationship is a relationship constructed based on the data included in the second initial distribution.

The relational expression is used for representing the association relation between the time delay change amount of the event period calculated based on the target on-screen frequency and the target test frequency and the time delay change amount of the event period acquired based on the test process.

It will be appreciated that the first and second relationships represent the same meaning, and that only the data used is different.

The event period is a period in which the blinking stripes are lit.

In actual execution, the first relation may be determined based on the following formula:

Wherein, For the target on-screen frequency,/>For the first test frequency,/>For the initial on-screen frequency,/>Is the first slope.

The second relationship may be determined based on the following formula:

Wherein, For the target on-screen frequency,/>For the second test frequency,/>For the initial on-screen frequency,/>Is a second slope.

It will be appreciated that the beat frequency results in a light source 820 being lit with a time point moving by an amount of time of the current frame of the augmented reality device for each frame passing；/>Is the measured rough head-up frequency,/>Is an integer with an accurate frequency of/>The PTP delay of each frame is affected by the beat frequency as multiplied by/>I.e., the total amount of change in PTP during each time light source 820 is on.

Is the change amount of PTP in 1s time,/>Multiplying/>Is/>Both sides are identical/>To show that the total amount of change in PTP per time the light source 820 was lit was actually counted during the measurement, fitting/>Has been summed/>Irrespective of the fact that the first and second parts are.

In the actual execution process, after the first relation and the second relation are determined, the first relation and the second relation are added, a calculation formula corresponding to the target on-screen frequency is obtained through deduction, and the numerical value of the target on-screen frequency is obtained through calculation based on known data in the test process.

The target on-screen frequency may be determined based on the following formula:

Wherein, For the target on-screen frequency,/>Is of a first slope,/>For the first test frequency,/>Is of a second slope,/>Is the second test frequency.

It can be understood that after the target on-screen frequency is obtained by calculation, the frequency of the light source signal generating device is set to be equal to the target on-screen frequency, and the to-be-detected augmented reality equipment 830 can be tested again to obtain the delay distribution of the to-be-detected augmented reality equipment, so that the PTP delay change period caused by beat frequency is eliminated in theory; as shown in fig. 7, the PTP delay of the beat frequency effect within the test time of 10min is 0.5ms, which can meet the subsequent test requirement, and fig. 7 is the test result when the target on-screen frequency is 89.999711 HZ.

With continued reference to fig. 12, by obtaining the initial on-screen frequency of the to-be-detected augmented reality device 830, two test event frequencies are obtained respectively, testing is performed based on the two test event frequencies respectively, delay distribution corresponding to the two test event frequencies is obtained, and the target on-screen frequency of the to-be-detected augmented reality device 830 is calculated based on the delay distribution corresponding to the two test event frequencies, so that in a subsequent test process, the frequency of the light source signal generating device is adjusted based on the target on-screen frequency, and the delay distribution under a required model is obtained.

According to the target on-screen frequency determining method provided by the embodiment of the invention, the first relation and the second relation are constructed through the data corresponding to the first initial distribution and the second initial distribution, namely the target on-screen frequency, the first test frequency, the second test frequency, the first slope, the second slope and the initial on-screen frequency, the first relation and the second relation are processed, the calculation formula of the target on-screen frequency is deduced, the accurate on-screen frequency of the augmented reality device is effectively calculated based on the acquired data and the calculation formula, the beat frequency error generated in the subsequent test process is dealt with, the test accuracy is improved, and the test error is reduced.

According to the target on-screen frequency determining method provided by the embodiment of the invention, the execution main body can be the target on-screen frequency determining device. In the embodiment of the invention, the method for determining the target on-screen frequency by using the target on-screen frequency determining device is taken as an example, and the target on-screen frequency determining device provided by the embodiment of the invention is described.

The embodiment of the invention also provides a device for determining the frequency of the target on-screen.

As shown in fig. 10, the target on-screen frequency determining apparatus includes: frequency acquisition 1010, test frequency determination 1020, and frequency calculation 1030.

The frequency acquisition module 1010 is configured to acquire an initial on-screen frequency of the augmented reality device 830 to be detected;

The test frequency determining module 1020 is configured to adjust the initial on-screen frequency based on the target step length to obtain a target test frequency of the light source signal generating device;

The frequency calculation module 1030 is configured to calculate a target on-screen frequency of the to-be-detected augmented reality device 830 based on the delay profile obtained by controlling the light source signal generating device by the target test frequency and controlling the to-be-detected augmented reality device 830 by the initial on-screen frequency.

According to the target on-screen frequency determining device provided by the embodiment of the invention, the target test frequency of the light source signal generating device is effectively obtained by adopting a frequency approximation method through the initial on-screen frequency and the target step length of the acquired to-be-detected augmented reality equipment 830; the method comprises the steps of testing a light source signal generating device controlled based on target test frequency and an initial on-screen frequency controlled augmented reality device to obtain two delay distributions, and effectively calculating to obtain target on-screen frequency based on data corresponding to the obtained delay distributions.

In some embodiments, the test frequency determination module 1002 may also be configured to:

In some embodiments, the frequency calculation module 1003 may also be configured to:

Constructing a second relation based on a second slope, a second test frequency, an initial on-screen frequency and a target on-screen frequency, wherein the relation is used for representing the association relation between the delay change amount of the event period calculated based on the target on-screen frequency and the target test frequency and the delay change amount of the event period acquired based on the test process; the event period is the period of flashing stripe lighting;

The delay time measuring device or the target on-screen frequency determining device in the embodiment of the invention can be electronic equipment, and can also be a component in the electronic equipment, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. The electronic device may be a Mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a Mobile internet appliance (Mobile INTERNET DEVICE, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) device, a robot, a wearable device, an ultra-Mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), etc., and may also be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a Television (TV), a teller machine, a self-service machine, etc., which are not particularly limited in the embodiments of the present invention.

The delay time measuring device or the target on-screen frequency determining device in the embodiment of the invention can be a device with an operating system. The operating system may be an Android operating system, an IOS operating system, or other possible operating systems, and the embodiment of the present invention is not limited specifically.

The delay time measuring device or the target on-screen frequency determining device provided by the embodiment of the present invention can implement each process implemented by the method embodiments of fig. 1 to 8 and fig. 12, and in order to avoid repetition, a description is omitted here.

In some embodiments, as shown in fig. 11, an electronic device 1100 is further provided in the embodiments of the present invention, which includes a processor 1101, a memory 1102, and a computer program stored in the memory 1102 and capable of running on the processor 1101, where the program when executed by the processor 1101 implements each process of the above-mentioned embodiments of the delay time measurement method or the target on-screen frequency determination method, and the same technical effects can be achieved, and for avoiding repetition, a detailed description is omitted herein.

The electronic device in the embodiment of the invention includes the mobile electronic device and the non-mobile electronic device.

The invention also provides a delay time measuring system.

The delay time measurement system includes: light source signal generating means and test device 840.

The delay time measurement system measures the delay time of the augmented reality device 830 to be measured based on the delay time measurement method as described in any one of the embodiments above; the target on-screen frequency of the augmented reality device 830 to be measured in the delay time measurement method may be calculated by the target on-screen frequency determining method according to any one of the embodiments.

In this embodiment, the test device 840 is coupled to the light source signal generating means and determines the target generator frequency based on the target on-screen frequency of the augmented reality device 830 to be tested.

The test-while-test device 840 is also connected to the augmented reality device under test 830.

The test device 840 is configured to control the light source signal generating device to generate a scintillation stripe at the target generator frequency, obtain a first delay distribution based on a time corresponding to the received scintillation stripe transmitted by the light source signal generating device and a time corresponding to the received collected scintillation stripe image transmitted by the to-be-tested augmented reality device 830, and obtain a second delay distribution based on a required test mode and the target generator frequency under the condition that the light source signal generating device and the to-be-tested augmented reality device 830 are co-frequency.

In some embodiments, the light source signal generating apparatus may further include: a signal generator 810 that generates a trigger signal based on a target generator frequency and a light source 820 that is coupled to the signal generator 810 and generates a scintillation fringe based on the trigger signal.

The light source 820 may be disposed in front of the augmented reality device 830 under test.

The augmented reality device 830 to be measured is fixed to a fixed head model.

The light source signal generating means is for generating a blinking stripe based on the target on-screen frequency of the augmented reality device to be measured 830.

The test device 840 is electrically connected to the light source signal generating means and the augmented reality device to be tested 830, respectively.

As shown in fig. 8, in the actual implementation, the light source signal generating device for generating the control signal may be connected to the LED light source so that it flashes at a specified frequency, and after it passes through the light homogenizing, it passes through a slit and exits as a parallel line light source.

The light source 820 is arranged in front of the to-be-detected augmented reality device 830, and the center of the to-be-detected augmented reality device 830 is aligned with the flicker light source 820, so that parallel rays emitted by the light source 820 can enter VSTCAMERA of the augmented reality device; at this time, the augmented reality device is fixed by a human head model installed on the storage platform.

After the VST perspective mode is started, the display optical machine of the augmented reality device also displays flicker, the variation of the flicker intensity of the LED light source and the variation of the flicker intensity of the display optical machine of the augmented reality device are respectively transmitted into the test device 840 through optical fibers, and obtaining a time difference value between each time of the lighting of the LED light source and the lighting of the display optical machine of the augmented reality equipment through data processing, and obtaining a PTP time delay condition of a long-time specified measurement interval.

According to the delay time measurement system provided by the embodiment of the invention, the target generator frequency corresponding to the light source signal generating device is determined through the target on-screen frequency of the to-be-measured augmented reality equipment 830, so that the time of generating the flicker stripe by the light source signal generating device is synchronous with the on-screen time frequency of the augmented reality equipment, and the phase difference is constant, thereby coping with delay fluctuation of the flicker stripe and the on-screen time point caused by beat frequency abnormality, and improving the stability of data and the test precision in the measurement process; under the condition that the light source signal generating device generates the flicker stripe based on the frequency of the target generator, the to-be-tested augmented reality device 830 is enabled to acquire the image of the flicker stripe, after the time determined based on the received flicker stripe transmitted by the light source signal generating device and the time determined based on the acquired image transmitted by the to-be-tested augmented reality device 830 are received, the second delay distribution is obtained by making a difference between the two times, so that the beat frequency error caused by the movement of the light source 820 in the upper screen frequency period of the lighting time point is effectively avoided, the accuracy of the test delay time is improved, and the whole process from capturing a real scene to the upper screen after the middle link processing is considered based on the delay distribution determined by the method, so that the test method has universality.

The embodiment of the invention also provides a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements each process of the above-mentioned delay time measurement method or the target on-screen frequency determination method embodiment, and can achieve the same technical effect, and in order to avoid repetition, the description is omitted here.

Wherein the processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the invention also provides a computer program product, which comprises a computer program, wherein the computer program is executed by a processor to realize the delay time measurement method or the target on-screen frequency determination method.

The embodiment of the invention further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running a program or instructions, the delay time measurement method or each process of the target on-screen frequency determination method embodiment can be realized, the same technical effect can be achieved, and the repetition is avoided, and the description is omitted here.

It should be understood that the chips referred to in the embodiments of the present invention may also be referred to as system-on-chip chips, chip systems, or system-on-chip chips, etc.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present invention is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the related art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), including several instructions for causing a terminal (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A delay time measurement method, characterized by being applied to a delay time measurement system for measuring delay time of an extended display device to be measured, the delay time measurement system including a light source signal generating device, the method comprising:

2. The method of claim 1, wherein controlling the light source signal generating device to generate a flicker stripe based on the required test pattern and the target generator frequency comprises:

3. The method of claim 1, wherein said controlling said light source signal generating device to generate a scintillation stripe based on said desired test pattern and said target generator frequency, further comprises:

4. A method of measuring delay time according to any one of claims 1 to 3, wherein said controlling said light source signal generating means to generate a blinking stripe based on a desired test pattern and said target generator frequency comprises:

5. A delay time measurement method according to any one of claims 1-3, characterized in that after said deriving the first delay profile, the method further comprises:

6. A target on-screen frequency determining method for use in the delay time measuring method according to any one of claims 1 to 5, comprising:

7. The method of determining a target on-screen frequency of claim 6, wherein the target step size comprises a first step size and a second step size, and the target test frequency comprises a first test frequency and a second test frequency;

the step of adjusting the initial on-screen frequency based on the target step length to obtain a target test frequency of the light source signal generating device comprises the following steps:

8. The method according to claim 7, wherein the calculating the target on-screen frequency of the augmented reality device to be measured based on the delay profile obtained by controlling the light source signal generating device by the target test frequency and controlling the augmented reality device to be measured by the initial on-screen frequency includes:

9. The method of determining a target on-screen frequency according to claim 8, wherein the calculating the target on-screen frequency based on the first slope and the second slope comprises:

10. A delay time measuring apparatus, characterized by being applied to a delay time measuring system that measures a delay time of an extended display device to be measured, the delay time measuring system including a light source signal generating device, the apparatus comprising:

11. A delay time measurement system, comprising:

A light source signal generating device;

12. The delay time measurement system of claim 11, wherein the light source signal generating means comprises: a signal generator for generating a trigger signal based on a target generator frequency and a light source coupled to the signal generator and generating a scintillation fringe based on the trigger signal.

13. The delay time measurement system of claim 11, wherein:

The light source signal generating device and the to-be-tested augmented reality equipment are respectively connected with the testing equipment through optical fibers to conduct testing.